History.—Miss V. R., aged 21, was admitted to El Centro Hospital May 8, 1936, complaining of severe abdominal pain of eight days' duration. There was no vomiting, no diarrhea and no vaginal discharge. The last menstrual period was ten days before admission. This period was of usual amount but of short duration. The previous period was missed. She had had no menstrual irregularities before that time. She had never been pregnant.

Examination.—The patient was well developed and moderately well nourished. Her temperature was 100, pulse 104, and respiration 24. The examination was negative except for tenderness in both lower abdominal quadrants, more marked on the right. The vagina admitted two fingers readily. Bartholin's glands were not palpable. The cervix was small, firm, nulliparous, and without discoloration or inflammation. The fundus was anterior and fixed but not enlarged. There was thickening in both adnexal regions, more marked